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IDENTIFIED INTANGIBLE ASSETS AND LIABILITIES - Schedule of Estimated Annual Amortization Expense (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Below-Market Operating Leases
2018	$ 10,005
2019	9,837
2020	9,699
2021	9,622
2022	9,575
Below-Market Ground Leases
2018	972
2019	972
2020	622
2021	590
2022	590
Above-market leases
Operating Leases
2018	1,289
2019	1,014
2020	807
2021	433
2022	327
In-place leases
Operating Leases
2018	7,431
2019	6,194
2020	4,982
2021	4,049
2022	$ 3,717

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